<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>bootstrap5</title>
  <link rel="stylesheet" href="css/bootstrap.min.css">
</head>

<body>

  <span class="btn btn-primary">按钮</span>
  <button class="btn btn-danger">另一个按钮</button>
  <a href="https://huhuiyu.top" class="btn btn-success">超链接按钮</a>

  <div style="width: 200px;" class="img-thumbnail">
    <img class="img-fluid" src="https://klcxy.top/oss-manage-service/ossinfo/queryOssUrl?tbOssInfo.oiid=109" alt="">
  </div>

  <div class="alert alert-danger alert-dismissible">
    一个消息
    <button class="btn-close" data-bs-dismiss="alert"></button>
  </div>

  <script src="js/bootstrap.bundle.min.js"></script>
</body>

</html>